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Research and application of composite stochastic resonance in enhancement detection
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作者 高蕊 焦尚彬 薛琼婕 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第1期264-273,共10页
Aiming at the problem that the intermediate potential part of the traditional bistable stochastic resonance model cannot be adjusted independently, a new composite stochastic resonance(NCSR) model is proposed by combi... Aiming at the problem that the intermediate potential part of the traditional bistable stochastic resonance model cannot be adjusted independently, a new composite stochastic resonance(NCSR) model is proposed by combining the Woods–Saxon(WS) model and the improved piecewise bistable model. The model retains the characteristics of the independent parameters of WS model and the improved piecewise model has no output saturation, all the parameters in the new model have no coupling characteristics. Under α stable noise environment, the new model is used to detect periodic signal and aperiodic signal, the detection results indicate that the new model has higher noise utilization and better detection effect.Finally, the new model is applied to image denoising, the results showed that under the same conditions, the output peak signal-to-noise ratio(PSNR) and the correlation number of NCSR method is higher than that of other commonly used linear denoising methods and improved piecewise SR methods, the effectiveness of the new model is verified. 展开更多
关键词 Woods–Saxon improved piecewise model composite stochastic resonance(SR) image denoising
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Polarization-Insensitive Magnetic Quadrupole-Shaped and Electric Quadrupole-Shaped Fano Resonances Based on a Plasmonic Composite Structure 被引量:1
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作者 董晨 李宝 +5 位作者 李韩笑 刘慧 陈孟琪 李冬冬 闫长春 张道华 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第7期68-71,共4页
A combined structure with the unit cell consisting of four sub-units with 90° rotation in turn is designed. Each of sub-units is composed of two gold rods in transverse arrangement and one gold rod in longitudina... A combined structure with the unit cell consisting of four sub-units with 90° rotation in turn is designed. Each of sub-units is composed of two gold rods in transverse arrangement and one gold rod in longitudinal arrangement. Simulating electromagnetic responses of the structure, we verify that the structure exhibits the double Fano resonances, which originate from the coupling between magnetic quadrupoles and electric dipoles and the coupling between electric quadrupoles and electric dipoles. Simulation results also demonstrate that the structure is polarization-insensitive and shows an analogue of electromagnetically induced transparency at the two Fano resonances. Such a plasmonic structure has potential applications in photoelectric elements. 展开更多
关键词 of is it in Polarization-Insensitive Magnetic Quadrupole-Shaped and Electric Quadrupole-Shaped Fano resonances Based on a Plasmonic composite Structure MODE that on
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NONLINEAR DYNAMICS RESPONSE OF CASING PIPE UNDER COMBINED WAVE-CURRENT 被引量:1
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作者 TANG You-gang(唐友刚) GU Jia-yang(谷家扬) +1 位作者 ZUO Jian-li(左建立) MIN Jian-qin(闵建琴) 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2005年第8期1040-1046,共7页
The vortex-induced nonlinear vibration of casing pipes in the deep water was studied considering the loads of current and combined wave-current. The vortex-induced vibration equation of a casing pipe was set up consid... The vortex-induced nonlinear vibration of casing pipes in the deep water was studied considering the loads of current and combined wave-current. The vortex-induced vibration equation of a casing pipe was set up considering the beam mode and Morison's nonlinear fluid loads as well as the vortex-excited loads. The approach of calculating vortex-excited nonlinear vibration by Galerkin's method was proposed. The natural vibration frequencies and modes were obtained, and the response including primary resonance induced by current and the composite resonance under combined wave-current for the 170 m long casing pipe in the 160 m depth of water were investigated. The results show that the dynamics response of casing pipe obviously increases, and the complicated response behaviors of casing pipe are described under combined wavecurrent. 展开更多
关键词 casing pipes in the deep water fluid dynamics combined wave-current vortex-excited vibration composite resonance
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